aisle

: a passage between sections of seats in a church, theater, airplane, etc.

: a passage where people walk through a store, market, etc.

Full Definition of AISLE

1

: the side of a church nave separated by piers from the nave proper

2

a (1): a passage (as in a theater or railroad passenger car) separating sections of seats (2): such a passage regarded as separating opposing parties in a legislature <supported by members on both sides of the aisle>